问题
选择题
Professor Smith, along with his assistants, on the project day and night to meet the deadline
(截止日期). [ ]
A. work
B. working
C. is working
D. were keeping
答案
答案：C
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Professor Smith, along with his assistants, on the project day and night to meet the deadline
(截止日期). [ ]
A. work
B. working
C. is working
D. were keeping
答案：C